C1111233131211111211113313331333133313232321331121111112113313232223231   >>    C111123313121111121111331333133313331323232133112111111211331323222323   <<    C1111233131211111211113313331333133313232321331121111112113313232223233   >>      C1111233131211111211113313331333133313232321331121111112113313232223232   >>